BATTERY SYSTEM FOR USE ON A VEHICLE ELECTRICAL SYSTEM OF A MOTOR VEHICLE

A battery system () for use on a vehicle electrical system () of a motor vehicle, comprising a negative pole (), a positive pole (), a battery module () and a switching unit () that has at least one actuatable switch and a current sensor () for measuring a battery current (IB) flowing through the battery system () is disclosed. The switching unit () is operable in a safety mode in which the at least one switch and the current sensor () interact such that the battery current (IB) is limited to a prescribed maximum value or is interrupted for a prescribed maximum period of time if the battery current (IB) exceeds a prescribed limit value and hence starting of the motor vehicle is prevented.